diff --git a/openpilot/selfdrive/modeld/modeld.py b/openpilot/selfdrive/modeld/modeld.py
index ee76d72f46..0d90f1225e 100755
--- a/openpilot/selfdrive/modeld/modeld.py
+++ b/openpilot/selfdrive/modeld/modeld.py
@@ -231,7 +231,8 @@ def main(demo=False):
 
   CHESTNUT = chestnut_compiled() and (chestnut_present() or cable_connected())
   if CHESTNUT:
-    os.environ['HCQDEV_WAIT_TIMEOUT_MS'] = '3000'
+    from tinygrad.runtime.ops_amd import AMDDevice
+    AMDDevice.wait_timeout_ms = 3000
   params = Params()
   params.put_bool("ChestnutLoading", CHESTNUT)
   params.remove("ChestnutActive")